During the meeting of all the suspects, Dreyfuss (Herbert Lom) puts a bomb in Clouseau's (Peter Sellers') car. When the suspects all rush out of the house to get away, they all pile into the tiny car and drive off. We hear an explosion. Dreyfuss comes running out and tells Clouseau that the bomb was meant for him. Clouseau says something about innocent lives being lost but Dreyfuss tell him that all the people in the car had killed someone or other during the movie, and thus were all guilty.
Thanks, Paul L!